Malicious PDF — malware analysis report

Static analysis result for SHA-256 706f00f22b8d99f1…

MALICIOUS

PDF

48.5 KB Created: 2021-06-03 22:03:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 725a0fad3a062495eab46a0997ab3942 SHA-1: 032c6534dc5eb91bd257722f13c22eb106317fe0 SHA-256: 706f00f22b8d99f102a9e4d82f627631164662fe22d7d953bd92e011584620fe
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/1330123889/pubg-uc-redeem-code-midasbuy-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/i-caught-my-mom-cheating-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004dde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DDE 28288 bytes
SHA-256: 7eb339afd0accc6d70eb36b58c084be55fe518d912ad524a0a551a2045b31fae
font_01_sfnt_off00008e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E86 2816 bytes
SHA-256: 214f0b8c2b3c279476f862ae08d7e072944da5f6084cbd6130f0ffdc3460b614
font_02_sfnt_off00009832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9832 19196 bytes
SHA-256: 7e73b0d7ef61bad039cf531cf4c829febd9bcf076c0819a161896e0fe870a921

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